Methyl tetrahydrophthalic anhydride (MeTHPA, MTHPA) is a new type of liquid organic acid anhydride epoxy resin curing agent with excellent performance. Because the acid anhydride curing agent has better heat resistance and chemical stability than the amine curing agent, and can maintain excellent physical and electrical properties at higher temperatures, in recent years, it has been insulated with the motor, electronics and electrical industries. The continuous improvement of structural reliability requirements has led to the rapid development of the application of such curing agents.

Methyl tetrahydrophthalic anhydride (MeTHPA, MTHPA) is a high performance product of anhydride curing agent. Its performance characteristics include high purity, light color, low viscosity, low volatility, low toxicity, low heating loss, stable performance, long pot life, and freezing point. Long-term storage at low and room temperature. Methylhexahydrophthalic anhydride (MeTHPA, MTHPA) is obtained by catalytic hydrogenation. Its properties are as follows: light color, colorless transparent body, epoxy cured product white color; good heat resistance, especially at 150 ° C The epoxy cured product has excellent mechanical and electrical properties, good weather resistance, is not affected by light and heat, and has good moisture resistance; high reactivity, rapid curing, and short gel time.

Anhydride curing agents for epoxy resins is widely used in epoxy potting materials, casting materials, bonding, lamination, impregnation, molding and winding processes, as well as insulation bushings, oil pipelines, fishing machinery and so on. For example: casting and filling electronic components, large dry-type transformers, high-voltage switches, capacitors, current and voltage transformers, large and micro motors, line output transformers, large resin-type insulators, etc. It is understood that the epoxy resin curing agent used in the manufacture of wind power blades and hubs is mainly an acid anhydride curing agent such as methyl tetrahydrophthalic anhydride (MeTHPA, MTHPA) or methyl hexahydrophthalic anhydride.